﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using DBViewModel.ViewModel;
using System.IO;
using System.IO.IsolatedStorage;
using Microsoft.Phone.BackgroundTransfer;

namespace WolfGuy
{
    public partial class App : Application
    {
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        private static MangaForYouViewModel _viewModel;
        public static MangaForYouViewModel ViewModel
        {
            get { return _viewModel; }
        }

        public bool isAutoDownload = false;
        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                Application.Current.Host.Settings.EnableFrameRateCounter = false;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are handed off to GPU with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;

                // Disable the application idle detection by setting the UserIdleDetectionMode property of the
                // application's PhoneApplicationService object to Disabled.
                // Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
                // and consume battery power when the user is not using the phone.
                PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
            }
            // Create database in isolated store
            MoveReferenceDatabase();

            // Create intance for list of DownloadAction
            //lstDownload = new List<DownloadAction>();

            // Specify the local database connection string.
            string DBConnectionString = "Data Source=isostore:Shared/Database/MangaForYou.sdf";

            try
            {
                // Create the ViewModel object.
                _viewModel = new MangaForYouViewModel(DBConnectionString);

                // Query the local database and load observable collections.
                //_viewModel.LoadAllMangas();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }

        public static void MoveReferenceDatabase()
        {
            try
            {
                

                // Obtain the virtual store for the application.
                IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
                if (!iso.DirectoryExists("/Shared/Download"))
                {
                    iso.CreateDirectory("/Shared/Download");
                }


                // Create a stream for the file in the installation folder.
                using (Stream input = Application.GetResourceStream(new Uri("Database/MangaForYou.sdf", UriKind.Relative)).Stream)
                {
                    if (!iso.DirectoryExists("/Shared/Database"))
                    {
                        iso.CreateDirectory("/Shared/Database");
                        if (!iso.FileExists("Shared/Database/MangaForYou.sdf"))
                        {

                            // Create a stream for the new file in isolated storage.
                            using (IsolatedStorageFileStream output = iso.CreateFile("Shared/Database/MangaForYou.sdf"))
                            {
                                // Initialize the buffer.
                                byte[] readBuffer = new byte[4096];
                                int bytesRead = -1;

                                // Copy the file from the installation folder to isolated storage. 
                                while ((bytesRead = input.Read(readBuffer, 0, readBuffer.Length)) > 0)
                                {
                                    output.Write(readBuffer, 0, bytesRead);
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void RemoveAllBackgroundRequests()
        {
            // Remove all background requests
            try
            {
                foreach (BackgroundTransferRequest request in BackgroundTransferService.Requests)
                {
                    BackgroundTransferService.Remove(request);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error happed when try to remove background transfer request(s). " + ex.Message);
            }
        }

        private void DeleteAllZipFiles()
        {
            // Delete zip files
            try
            {
                using (IsolatedStorageFile isofile = IsolatedStorageFile.GetUserStoreForApplication())
                {
                    foreach (string strFileName in isofile.GetFileNames("shared/transfers/*"))
                    {
                        isofile.DeleteFile("shared/transfers/" + strFileName);
                    }

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error happened when try to delete zip file(s). Error:" + ex.Message);
            }
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
            isAutoDownload = false;
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new PhoneApplicationFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}